I agree. I know people who have the genus Zebrasoma in their 60-90 tanks and have done very well over the years. Keep in mind that you will not be able to stock it as much becasue they do like their space. I have a 120 and made the mistake of buying a Vlamingii tang without doing my homework. He went from 1 inch to about 5 in less than 6 months and ended up spending a lot of his time darting from one end of the tank to the other. He was miserable and made all the other fish in my tank very stressed as well. I was fortunate that he was very greedy eater and I was able to get him out of the tank with a net because he would eat out of my hand. He ended up going to a 500 gallon tank in southern Ontario. Kole tang is another good choice. Again a tank that size...the yellow tang will rule and will need his space.